The Main Challenge
A gentle logic puzzle for all members of the family to try.
The nine numbers, 1-9, must be placed into the 3-by-3 grid by following these rules:
- 1 is in the top right-hand corner
- 3 and 8 are also in the top row
- 2 is in the middle row, left-hand side
- 4 and 6 are both in the bottom row
- 8 and 7 are in the left-hand column
- 6 and 9 are in the right-hand column
x x x
x x x
x x x
Can you now insert the numbers 1-9, once each, into the correct places?
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 1st & 6th columns contain the following fourteen numbers:
7 13 21 22 27 30 36 40 49 54 55 56 60 64
Find three pairs of numbers that each total 43.
The Factors Challenge
Which FOUR numbers below are factors of 345?
3 5 7 9 11 13 15 17 19 21 23 25
The Mathematically Possible Challenge
Using 1, 3 and 9 once each, with + – × ÷ available, which FIVE numbers is it possible to make from the list below?
4 8 12 16 20 24 28 32 36 40
#4TimesTable
The Target Challenge
Can you arrive at 345 by inserting 5, 10, 15, 20 and 25 into the gaps on each line below?
- (◯+◯÷√◯)×(◯+◯) = 345
- (◯+◯)×◯–◯÷◯ = 345
Answers can be found here.
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